[Bug 11990] Kernel hang in spin_unlock_irq from scsi_request_fn from do_IRQ

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http://bugzilla.kernel.org/show_bug.cgi?id=11990





------- Comment #1 from vandrove@xxxxxxxxxx  2008-11-09 01:57 -------
Apparently my lower bound test kernel did not had Jens's patch to use tagged
queuing from SCSI layer applied.  I've discovered reliable test case (write 4GB
of data concurrently to every attached disk), and found that reverting all 4
SATA tagged queueing related checkins gets rid of the problem:

43a49cbdf31e812c0d8f553d433b09b421f5d52c
3070f69b66b7ab2f02d8a2500edae07039c38508
e013e13bf605b9e6b702adffbe2853cfc60e7806
2fca5ccf97d2c28bcfce44f5b07d85e74e3cd18e


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